Pathological alterations associated with photodynamic and laser treatment
| • | Coagulation necrosis, sometimes with haemorrhagic necrosis, clearly demarcated from non-neoplastic tissue |
| • | Intravascular coagulation |
| • | Moderate to severe oedema of the normal urothelial mucosa. Necrosis is rare |
| • | Spindle cell artifact of urothelial cells |
| • | Dystrophic calcification |